JP6608952B2 - Communication method and communication device - Google Patents

Description

  The present invention relates to the field of communication technology, and more particularly to a communication method and a communication device.

  This application claims priority to Chinese Patent Application No. 20150949655.2 entitled “COMMUNICATION METHOD AND COMMUNICATIONS DEVICE” filed with the Chinese Patent Office on August 13, 2015. The entirety of which is incorporated herein by reference.

  In order to ensure better communication quality, the network side device needs to configure a neighboring cell for user equipment (User Equipment, UE) so that cell handover needs to be performed. Are handed over to neighboring cells.

  Currently, using a Long Term Evolution (LTE) communication system as an example, a base station is typically configured and configured with neighboring cells by using an Automatic Neighbor Relation (ANR) mechanism. Stores related information of neighboring cells.

  The enforcement process of configuring neighboring cells by using the ANR mechanism instructs the UE to measure a specific absolute radio frequency channel number (ARFCN), and the UE A new cell is recognized according to the physical frequency indicated by the ARFCN, a physical cell identifier (PCI) of the recognized new cell is reported to the base station, and a cell corresponding to the PCI is newly recognized. The base station distributes the measurement configuration (reportCGI) measurement task and requests the UE to report the cell global identifier (CGI) of the neighbor cell. And the reported neighbor cell's center physical frequency is the physical frequency indicated by the ARFCN, the cell ID is the PCI value, the UE is the physical frequency indicated by the ARFCN, and The system information of the cell whose cell ID is the PCI value is read, the CGI of the neighboring cell is obtained, the CGI is reported to the base station, the base station is the physical frequency indicated by ARFCN, and the cell A cell whose ID is a PCI value is added as a neighbor cell, CGI is associated with ARFCN and PCI, and CGI, ARFCN, and PCI are stored as information about the added neighbor cell.

  Currently, a neighbor cell configured by using the aforementioned ANR mechanism is used as a target cell. When cell handover is performed, handover failure often occurs, and how to resolve the handover failure is a problem to be solved urgently in the industry.

  Embodiments of the present invention provide a communication method and a communication device so as to improve the success rate of cell handover.

According to a first aspect, a communication method is provided,
Sending a message comprising a measurement configuration to a user equipment by a first base station, wherein the measurement configuration is used to request the user equipment to report a cell global identifier of a cell;
Obtaining by a first base station a measurement report reported by the user equipment and corresponding to the measurement configuration, the measurement report comprising a cell global identifier of the cell and cell band information;
Performing cell handover by the first base station based on the cell bandwidth information and the cell global identifier of the cell.

In connection with the first aspect, in the first mode of implementation:
If one band is configured for a cell, the band information includes the band configured for the cell,
If at least two bands are configured for the cell, the band information includes a band configured for the cell and an additional band list configured for the cell, where the additional band list is for the cell Is used to store another band other than the band configured in

In connection with the first mode of operation of the first aspect, in the second mode of operation:
If at least two bands are configured for the cell, the measurement report further includes cell band priority information;
Band priority information is used to indicate whether the priority of the band in the further band list configured for the cell is higher than the priority of the band configured for the cell.

In connection with the first aspect, or the first implementation manner of the first aspect, or the second implementation manner of the first aspect, in the third implementation manner, the user equipment by the first base station Before the step of obtaining the measurement report reported by
Transmitting indication information by the first base station, wherein the indication information is further used to instruct the user equipment to report the cell bandwidth information.

In connection with the third mode of implementation of the first aspect, in the fourth mode of implementation, prior to the step of transmitting the indication information by the first base station, the method comprises:
Obtaining performance information reported by the user equipment, wherein the performance information is used to indicate whether the user equipment supports reporting of cell bandwidth information; and
Determining according to the performance information that the user equipment supports reporting of cell bandwidth information.

  In connection with the third mode of implementation of the first aspect or the fourth mode of implementation of the first aspect, in the fifth mode of implementation, the instruction information is included in the message.

  In connection with any one of the first aspect or the preceding implementation manners of the first aspect, in a sixth implementation manner, the message is a radio resource control RRC connection reconfiguration message.

In connection with the first aspect, in a seventh mode of implementation, the method comprises:
Selecting handover absolute radio frequency channel number ARFCN for a user equipment based on cell bandwidth information by a first base station when a handover is performed by using an X2 interface, the cell comprising: Belongs to the second base station, and
Obtaining a key based on the downlink ARFCN by the first base station and transmitting the key to the second base station.

In connection with the second mode of operation of the first aspect, in an eighth mode of operation, the method comprises:
When the handover is performed by using the X2 interface, the first base station selects a downlink absolute radio frequency channel number ARFCN for the user equipment based on the cell band information and the band priority information. The cell belongs to the second base station, and
Obtaining a key based on the downlink ARFCN by the first base station and transmitting the key to the second base station.

According to a second aspect, a communication method is provided,
Obtaining the bandwidth priority information of the cell of the second base station by the first base station, wherein the bandwidth priority information includes a bandwidth priority in a further bandwidth list configured for the cell; Used to indicate whether it is higher than the priority of the band configured for the cell, and the additional band list is used to store another band other than the band configured for the cell , Steps and
Selecting a downlink absolute radio frequency channel number ARFCN for a user equipment based on cell bandwidth priority information by a first base station when a handover is performed by using an X2 interface;
Obtaining a key based on the downlink ARFCN by the first base station and transmitting the key to the second base station.

In connection with the second aspect, in the first mode of implementation, the step of obtaining band priority information of the cell of the second base station by the first base station comprises:
Receiving, by the first base station, response information sent by the second base station of the X2 setup request message, the response information including cell band priority information.

In connection with the second aspect, in the second mode of implementation, the step of obtaining band priority information of the cell of the second base station by the first base station comprises:
Receiving, by a first base station, an X2 setup request message transmitted by a second base station, the X2 setup request message including cell bandwidth priority information.

According to a third aspect, a communication method is provided,
Receiving a message sent by a user equipment by a first base station and including a measurement configuration, wherein the measurement configuration is used to request the user equipment to report a cell global identifier of a cell. , Steps and
Obtaining a cell global identifier of the cell and cell band information by the user equipment and generating a measurement report corresponding to the measurement configuration;
Reporting a measurement report by a user equipment, the measurement report including a cell global identifier of the cell and cell bandwidth information.

In connection with the third aspect, in the first mode of implementation,
If one band is configured for a cell, the band information includes the band configured for the cell,
If at least two bands are configured for the cell, the band information includes a band configured for the cell and an additional band list configured for the cell, where the additional band list is for the cell Is used to store another band other than the band configured in

In connection with the first mode of implementation of the third aspect, in the second mode of operation:
If at least two bands are configured for the cell, the measurement report further includes cell band priority information;
Band priority information is used to indicate whether the priority of the band in the further band list configured for the cell is higher than the priority of the band configured for the cell.

In connection with the third aspect, or the first mode of implementation of the third aspect, or the second mode of implementation of the third aspect, in the third mode of implementation, the user equipment may obtain cell band information. Before the step to get, the method is
Receiving, by the user equipment, indication information transmitted by the first base station, wherein the indication information is used to instruct the user equipment to report cell band information; .

  In connection with the third mode of implementation of the third aspect, in the fourth mode of implementation, a first indication message is included in the message.

In connection with any one of the third aspect or the previous implementations of the third aspect, in a fifth implementation, the method comprises:
Reporting performance information by the user equipment further comprising the step of using the performance information to indicate whether the user equipment supports reporting of cell bandwidth information.

  In connection with any one of the aforementioned aspects of the third aspect or the third aspect, in a sixth embodiment, the message is a radio resource control RRC connection reconfiguration message.

According to a fourth aspect, a base station is provided,
A transmission unit configured to transmit a message including a measurement configuration to a user equipment, wherein the measurement configuration is used to request the user equipment to report a cell global identifier of a cell; ,
An acquisition unit that is reported by the user equipment and configured to acquire a measurement report corresponding to the measurement configuration, the measurement report comprising a cell global identifier of the cell and cell bandwidth information;
And a control unit configured to perform cell handover based on the cell global identifier of the cell acquired by the acquisition unit and the cell band information.

In connection with the fourth aspect, in the first mode of implementation,
If one band is configured for a cell, the band information includes the band configured for the cell,
If at least two bands are configured for the cell, the band information includes a band configured for the cell and an additional band list configured for the cell, where the additional band list is for the cell Is used to store another band other than the band configured in

In connection with the first mode of implementation of the fourth aspect,
If at least two bands are configured for the cell, the measurement report further includes cell band priority information;
Band priority information is used to indicate whether the priority of the band in the further band list configured for the cell is higher than the priority of the band configured for the cell.

In connection with the fourth aspect, or the first mode of implementation of the fourth aspect, or the second mode of implementation of the fourth aspect, in the third mode of implementation, the transmitting unit comprises:
Before the acquisition unit obtains the measurement report reported by the user equipment, it is further configured to send indication information, the indication information is used to instruct the user equipment to report the cell bandwidth information Is done.

In connection with the third mode of implementation of the fourth aspect, in the fourth mode of implementation, the acquisition unit comprises:
Further configured to obtain performance information reported by the user equipment before the transmission unit transmits the indication information and to determine according to the performance information that the user equipment supports reporting of cell bandwidth information; And the performance information is used to indicate whether the user equipment supports reporting of cell bandwidth information.

  In connection with the third mode of implementation of the fourth aspect or the fourth mode of implementation of the fourth aspect, in the fifth mode of implementation, the instruction information is included in the message.

  In relation to any one of the fourth aspect or the previous implementation manner of the fourth aspect, in a sixth implementation manner, the message is a radio resource control RRC connection reconfiguration message.

In connection with the fourth aspect, in a seventh mode of implementation, the control unit comprises:
When a handover is performed by using the X2 interface, the downlink absolute radio frequency channel number ARFCN for the user equipment is selected based on the cell bandwidth information, the key is obtained based on the downlink ARFCN, and the key Is transmitted to the second base station, and the cell belongs to the second base station.

In connection with the second mode of implementation of the fourth aspect, in the eighth mode of implementation, the control unit comprises:
When a handover is performed by using the X2 interface, the downlink absolute radio frequency channel number ARFCN for the user equipment is selected based on the cell bandwidth information and the bandwidth priority information, and the key based on the downlink ARFCN And is further configured to transmit the key to the second base station, the cell belonging to the second base station.

According to a fifth aspect, a base station is provided,
An acquisition unit configured to acquire band priority information of a cell of a second base station, wherein the band priority information is a priority of a band in a further band list configured for the cell. Used to indicate whether it is higher than the priority of the band configured for the cell, and the additional band list is used to store another band other than the band configured for the cell The acquisition unit,
A selection unit configured to select a downlink absolute radio frequency channel number ARFCN for the user equipment based on cell bandwidth priority information when a handover is performed by using the X2 interface;
A transmission unit configured to obtain a key based on the downlink ARFCN selected by the selection unit and to transmit the key to the second base station.

In connection with the fifth aspect, in a first mode of implementation, the acquisition unit obtains the bandwidth priority information of the cell of the second base station in the next aspect, that is, the second base station in the X2 setup request message. Is received, and the response information is specifically configured to be acquired in a manner that includes the cell bandwidth priority information.

In connection with the fifth aspect, in the second mode of implementation, the acquisition unit obtains the bandwidth priority information of the cell of the second base station in the following manner:
An X2 setup request message transmitted by the second base station is received, and the X2 setup request message is specifically configured to obtain in a manner that includes cell bandwidth priority information.

According to a sixth aspect, user equipment is provided,
A receiving unit transmitted by a first base station and configured to receive a message including a measurement configuration, the measurement configuration for requesting user equipment to report a cell global identifier of a cell The receiving unit used; and
A generating unit configured to obtain a cell global identifier of the cell and cell bandwidth information and generate a measurement report corresponding to the measurement configuration received by the receiving unit;
A reporting unit configured to report a measurement report generated by the generation unit, the measurement report including a reporting unit that includes a cell global identifier of the cell and cell bandwidth information.

In connection with the sixth aspect, in the first mode of implementation,
If one band is configured for a cell, the band information includes the band configured for the cell,
If at least two bands are configured for the cell, the band information includes a band configured for the cell and an additional band list configured for the cell, where the additional band list is for the cell Is used to store another band other than the band configured in

In connection with the first mode of implementation of the sixth aspect,
If at least two bands are configured for the cell, the measurement report further includes cell band priority information;
Band priority information is used to indicate whether the priority of the band in the further band list configured for the cell is higher than the priority of the band configured for the cell.

In relation to the sixth aspect, or the first mode of implementation of the sixth aspect, or the second mode of implementation of the sixth aspect, in the third mode of implementation, the receiving unit comprises:
It is further configured to receive instruction information transmitted by the first base station before the generating unit obtains the cell band information, the instruction information being transmitted to the user equipment to report the cell band information. Used to indicate.

  In connection with the third mode of implementation of the sixth aspect, in the fourth mode of implementation, the instruction message is included in the message.

In connection with any one of the sixth aspect or the preceding implementation manner of the sixth aspect, in the fifth implementation manner, the reporting unit comprises:
Further configured to report performance information, the performance information is used to indicate whether the user equipment supports reporting of cell bandwidth information.

  In connection with any one of the sixth aspect or the previous implementation manners of the sixth aspect, in the sixth implementation manner, the message is a radio resource control RRC connection reconfiguration message.

  In the communication method and the communication device provided in the embodiment of the present invention, the base station transmits a message including the measurement configuration to the UE, and the base station performs the measurement, the cell band information, or the cell Obtaining band information and band priority information, whereby the base station stores the complete and accurate band information of the cell. Thus, the base station can make an accurate handover decision, thereby avoiding handover failure.

2 is a communication architecture of a communication method application according to an embodiment of the present invention; 3 is an implementation flowchart of a communication method according to an embodiment of the present invention. 3 is an implementation flowchart of a communication method according to an embodiment of the present invention. 3 is an implementation flowchart of a communication method according to an embodiment of the present invention. 6 is an implementation flowchart of another communication method according to an embodiment of the present invention; FIG. 3 is a schematic diagram of interaction between base stations according to an embodiment of the present invention. 6 is an implementation flowchart of still another communication method according to an embodiment of the present invention; 6 is an implementation flowchart of still another communication method according to an embodiment of the present invention; 6 is an implementation flowchart of still another communication method according to an embodiment of the present invention; FIG. 3 is a schematic diagram of an interaction between a UE and a base station according to an embodiment of the present invention. FIG. 6 is another schematic diagram of interaction between a UE and a base station according to an embodiment of the present invention. It is a schematic block diagram of the base station by embodiment of this invention. It is a schematic block diagram of the base station by embodiment of this invention. It is a schematic block diagram of another base station by embodiment of this invention. It is a schematic block diagram of another base station by embodiment of this invention. It is a schematic block diagram of the user equipment by embodiment of this invention. It is a schematic block diagram of the user equipment by embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

  Technical solutions of embodiments of the present invention include, for example, Global System of Mobile Communications (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA) System, General Packet Radio Service (General Packet Radio Service, GPRS), Long Term Evolution (Long Term Evolution, LTE), LTE Frequency Division duplex (Dux) D) System, LTE Time Division Duplex (TDD), Universal Mobile Telecommunications System (Universal Mobile Communications System, UMTS), and World Wide Interoperability for Microwave Access (Worldwide InternetAvailabilityX) It should be understood that it can be applied to various communication systems such as communication systems.

  It should also be understood that in the embodiments of the present invention, user equipment (User Equipment, UE) may be referred to as a terminal (Terminal), a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), and the like. User equipment may communicate with one or more core networks via a radio access network (RAN). For example, the user equipment may be a mobile phone (also called a cellular phone) or a computer with a mobile terminal. For example, the user equipment may also be a portable pocket-sized, handheld, built-in computer, or in-vehicle mobile device that exchanges voice and / or data with a radio access network.

  In an embodiment of the present invention, the base station may be a base station (Base Transceiver Station, abbreviated as BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or an evolved type in LTE. It should also be understood that it may be a NodeB (evolved Node B, eNB or e-NodeB for short), which is not limited in the present invention.

  In radio spectrum resources, physical frequencies in different bands may overlap, that is, one physical frequency may belong to different bands. Each band includes several channels, and each channel is one ARFCN (in LTE systems, ARFCN is sometimes referred to as EAFRCN. In this specification, for convenience of description, ARFCN and EAFRCN). Are not distinguished, and ARFCN is used for description purposes, which is not limited in the present invention). Therefore, one ARFCN indicates one physical frequency and one band. However, the physical frequency indicated by ARFCN may correspond to one or more bands. Currently, during the implementation process of configuring neighboring cells by using the ANR mechanism, if the physical frequency indicated by the ARFCN belongs to multiple bands, the UE shall Report the CGI of the cell. The base station associates the CGI with the ARFCN and the PCI, and stores the CGI, the ARFCN, and the PCI as information regarding the added neighboring cell. In this method, information about stored neighbor cells may be inaccurate or incomplete. For example, the ARFCN measured under the command of the base station is equal to 5790, the physical frequency indicated by ARFCN = 5790 is 740 MHz, and a cell having a physical frequency of 740 MHz is an overlapping physical of band 12 and band 17. Belongs to frequency. However, the base station instructs to measure the band 17, and the band information of the neighboring cell stored by the base station is the band 17. Therefore, the following two scenarios can exist.

  Scenario 1: If a neighboring cell belongs to band 12, the base station stores inaccurate band information.

  Scenario 2: If the neighboring cell belongs to band 12 and band 17, the base station stores incomplete band information.

  When performing cell handover, the UE performs a handover decision according to information about neighboring cells stored by the base station. Since the base station stores inaccurate or incomplete information about neighboring cells, inevitably the UE may make an inaccurate handover decision and may perform a cell handover successfully. Can not. For example, different bands define different performance indicators. The UE may support band 17 but does not support band 12. In scenario 1, the base station incorrectly assumes that the UE can be handed over to a neighboring cell. If the UE is handed over to a neighboring cell, the handover fails because the UE does not support neighboring cell bands.

  In scenario 2, if the UE supports only band 12 and does not support band 17, the base station incorrectly assumes that the UE cannot be handed over to a neighboring cell. Stop the handover to be performed. Thus, the user service can be affected.

  Embodiments of the present invention provide a communication method so that the base station correctly stores complete bandwidth information, thereby avoiding problems such as handover failure.

  The communication method and communication device provided in the embodiments of the present invention can be applied to the communication architecture shown in FIG. In FIG. 1, the interface between the first base station and the second base station is referred to as the X2 interface, and the first base station and the second base station are respectively configured using the X2 interface setup process. Cell information can be exchanged. The interface between the base station and the UE is a Uu interface, that is, an air interface. The base station and the UE communicate with each other by using an air interface, such as the interface between the first base station and the UE in FIG. The first base station and the second base station may communicate with a mobility management entity (MME) and a serving gateway (Serving Gateway, S-GW), details of this implementation of the present invention. It is not described in the form.

  FIG. 2A is an implementation flowchart of a communication method according to an embodiment of the present invention. The method shown in FIG. 2A is performed by a base station, and for convenience of description, the base station is referred to as the first base station in this embodiment of the invention. As shown in FIG. 2A, the method includes:

  S101: The first base station transmits a message including a measurement configuration to the UE.

  In this embodiment of the invention, the measurement configuration is used to request the UE to report the cell global identifier of the designated cell, which is recognized by the first base station, for example. And a cell to be used as a neighbor cell. The cell global identifier according to this embodiment of the present invention may be a CGI or an evolved universal mobile telecommunications system telescopic radio access network cell global identifier (E-UTRAN Cell Global Identifier, ECGI), Note that this is not limited in this embodiment of the invention. This embodiment of the invention is described by using an example where the UE is required to report the CGI of a specified cell. In this method, the measurement configuration may be configured as measuring and reporting a cell global identifier (reportCGI). That is, this embodiment of the invention is described by using an example where the measurement configuration is reportCGI.

  In this embodiment of the present invention, the message sent by the first base station to the UE may be a Radio Resource Control (RRC) message. Optionally, the message in this embodiment of the invention may be an RRC connection reconfiguration message.

  S102: The first base station obtains a measurement report reported by the UE.

  In this embodiment of the invention, after receiving a message transmitted by the first base station and including a report CGI, the UE performs a measurement and obtains the CGI of the cell indicated by the first base station. Then, the system information of the cell is read, the band information of the cell is acquired, and the measurement report is generated. The measurement report corresponds to the report CGI and includes the cell CGI and the cell bandwidth information.

  In this embodiment of the present invention, the cell band information obtained by the first base station may be as follows:

  A: When one band is configured for a cell, the band information includes the band configured for the cell. The band configured for the cell is carried in a band indicator (freqBandIndicator) information element in the system message.

  B: If at least two bands are configured for a cell, the band information includes a band configured for the cell and a further band list configured for the cell. The additional band list configured for the cell is used to store information regarding other bands other than the band configured for the cell. Information about the band configured for the cell is carried in the freqBandIndicator information element in the system message. A further band list configured for the cell is carried in a multiband infolist information element if the physical frequency of the cell belongs to multiple bands.

  Note that in the present invention, the band carried in the freqBandIndicator information element is called the configured band. Except for the configured band, other bands are carried in the multiBandInfoList information element. In the present invention, the bands carried in the multiBandInfoList information element are referred to as a configured further band list. The previous version of the UE can recognize only the freqBandIndicator information element and cannot recognize the multiBandInfoList information element. When the operator sets a cell in which a plurality of bands are configured, which band is carried in the freqBandIndicator depends on the operator's policy.

  In previous communication versions, only one band can be configured for one cell, ie, the band is carried in the freqBandIndicator information element. In the present invention, the band carried in the freqBandIndicator information element is called a configured band. In later communication versions, multiple bands can be configured for one cell. Except for the first configured band, other bands are carried in the multiBandInfoList information element. In the present invention, the bands carried in the multiBandInfoList information element are referred to as a configured further band list. In the previous communication version, the UE can recognize only the freqBandIndicator information element, and cannot recognize the multiBandInfoList information element. When the operator sets a cell in which a plurality of bands are configured, which band is carried in the freqBandIndicator depends on the operator's policy.

  Optionally, in this embodiment of the present invention, when at least two bands are configured for the cell, i.e., the multiBandInfoList information element is broadcast and the band priority information is broadcast in the system information of the cell. The measurement report may include bandwidth priority information, where the bandwidth priority information indicates that the bandwidth priority in the additional bandwidth list configured for the cell is the priority of the bandwidth configured for the cell. Used to indicate whether it is higher than degrees. Band priority information is carried in a band priority indicator (freqBandIndicator) information element.

  S103: The first base station performs cell handover based on the cell band information and CGI.

  In this embodiment of the invention, the first base station may store cell band information, i.e., the first base station stores the complete and accurate band information of the cell. If the cell is being used as a neighbor cell by using the ANR mechanism, when the cell is subsequently used as the target cell for cell handover, the first base station Cell handover may be performed based on the stored complete and accurate information of neighboring cells.

  In this embodiment of the invention, the first base station may perform a cell handover decision based on the stored band information of neighboring cells, i.e. the UE hands to the cell used as the target cell. It can be determined whether it is possible to be over. In order to determine whether the UE can be handed over to the cell used as the target cell, the following method may be used. That is, if the UE supports one band in the band information of the cell, the UE can be handed over to the cell, otherwise the UE can be handed over. It is considered impossible.

  In this embodiment of the present invention, the process of performing a cell handover decision based on stored bandwidth information of neighboring cells is not limited to UEs reporting measurement reports, but other than UEs reporting measurement reports Note that it can be applied to another UE.

  Optionally, in this embodiment of the invention, during a particular implementation, the first base station may send indication information to the UE to indicate to the UE whether to report cell band information. . That is, before the first base station receives the measurement report reported by the UE, the method may further include the following steps.

  S101a: The first base station transmits instruction information, which is used to instruct the UE to report cell band information.

  In this embodiment of the invention, the indication information transmitted by the first base station may be included in the message transmitted by the first base station to the UE and including the measurement configuration. The message may be RRC information such as RRC connection reconfiguration information.

  Optionally, if the cell's central physical frequency belongs to multiple bands, the first base station transmits indication information; otherwise, the first base station saves the air interface signaling overhead. The base station does not transmit instruction information.

  In this embodiment of the present invention, please refer to FIG. 2B for the implementation process of S101a included in the communication method.

  Optionally, further, whether the UE supports band information reporting is a UE performance. Therefore, before transmitting the indication information, the first base station further obtains the performance information reported by the UE, determines according to the performance information that the UE supports the reporting of band information, and the UE May determine to support the reporting of band information, the instruction information may be sent to the UE to instruct the UE to report the band information. That is, based on FIG. 2B, the method may further include the following steps.

  S101b: Obtain performance information reported by the UE, and the performance information is used to indicate whether the UE supports reporting of cell band information.

  S101c: According to the performance information, determine that the UE supports reporting of cell band information.

  In this embodiment of the present invention, please refer to FIG. 2C for the implementation process of S101b and S101c included in the communication method.

  In this embodiment of the invention, the base station uses the report CGI measurement to obtain cell bandwidth information, or cell bandwidth information and bandwidth priority information, so that the base station can obtain the complete and accurate information of the cell. Storing bandwidth information. Thus, the base station performs an accurate handover decision, thereby avoiding handover failures.

  During certain implementations, this embodiment of the invention is not limited to the implementation described above. For example, in this embodiment of the invention, a new RRC process may be defined to obtain information about cells used as neighbor cells. The base station sends a request message to the UE, the request message is used to request to obtain cell band information, and the request message is ARFCN, PCI, and / or CGI for specifying the cell. Information may be included. The UE reads the system information of the cell to obtain the band information, and then the UE sends a response message containing the band information to the base station so that the base station can identify the exact and Store complete bandwidth information.

  When the source base station and the target base station perform handover by using the X2 interface, the source base station obtains the key using the downlink ARFCN of the target cell as a parameter, and obtained After transmitting the key to the target base station, thereby completing the handover, the target base station communicates with the UE by using the key. The UE receives the downlink ARFCN of the target cell determined by the target base station and obtains a key based on the downlink ARFCN, whereby the UE uses the key after the handover is completed To communicate with the base station. The key obtained by the UE and the key obtained by the source base station need to be the same, which requires that the source base station and the UE need to obtain the key using the same ARFCN. Further, when the central physical frequency of the target cell belongs to a plurality of bands, the band of the target cell selected by the source base station and the target base station for the UE needs to be the same. Since the physical frequency channel number is determined, ARFCN is selected when a band is selected. In other words, the downlink ARFCN of the target cell selected by the source base station and the target base station for the UE needs to be the same. Therefore, when the neighboring cell band information stored by the source base station is inaccurate or incomplete, or the band information stored by the source base station is different from the band information stored by the target base station. The band selected by the source base station may be different from the band selected by the target base station. Therefore, the UE and the target base station use different keys, leading to handover failure. During the handover process by using the X2 interface, the source base station may obtain a key for another cell of the target base station other than the target cell. The (another) cell is used as a potential re-establishment preparation cell to respond to the potential re-establishment process. The (alternative) cell's downlink ARFCN may be used as a parameter to obtain a key, and the same problem also exists.

  In this embodiment of the invention, the handover needs to be performed by using the X2 interface and the key needs to be obtained for the cell (used as the handover target cell or potential re-establishment preparation cell) If there is, the first base station selects a downlink ARFCN for the UE based on the cell band information, or the cell band information and the band priority information, and obtains a key based on the downlink ARFCN. The obtained key may be transmitted to the second base station. The second base station is a base station that sets up an X2 interface with the first base station, and may be used as a target base station for X2 handover, and the cell is connected to the second base station. Belongs.

  In this embodiment of the present invention, the first base station obtains the band information of the cell used as the target cell, or the band information of the cell and the band priority information. Thus, the first base station used as the source base station and the second base station used as the target base station select the same band for the UE based on the same rules, and the UE parameterizes the band. To obtain a key, so that the obtained key is the same, thereby avoiding handover failure.

  In this embodiment of the present invention, the base station uses the report CGI measurement to obtain cell band information, or cell band information and band priority information, so that the base station can obtain the complete and accurate information of the cell. Band information can be obtained and an accurate handover decision can be made, and the band selected by the source base station is the same as the band selected by the target base station, thereby avoiding handover failure.

Currently, when two base stations set up an X2 interface, the two base stations can exchange bandwidth information for each cell, ie, the ARFCN for each cell, the bandwidth in the corresponding freqBandIndicator information element, Additional band lists in the multiBandInfoList information element may be exchanged. However, if the cell belongs to multiple bands, i.e. if the multiBandInfoList information element is broadcast, the base station selects differently to select the band for the UE according to whether the freqBandIndicatorPriority information element is broadcast. Use the mechanism, ie
If the freqBandIndicatorPriority information element is broadcast and the UE supports the feature, the band indicated in the multiBandInfoList and supported by the UE is preferentially selected for the UE. The higher rank of the band in the multiBandInfoList indicates the higher priority of the band, i.e. the first band supported by the UE among the bands listed in the multiBandInfoList is selected and in the multiBandInfoList If none of the listed bands are supported by the UE, the band indicated by the freqBandIndicator is selected, or the freqBandIndicatorPriority is not broadcast, or the UE does not support the feature In the case, it is determined whether the UE supports the band indicated by the freqBandIndicator, and freqBan If the UE supports the band indicated by dIndicator, the band indicated by freqBandIndicator is selected, and if the UE does not support the band indicated by freqBandIndicator, it is in multiBandInfoList. The band shown and supported by the UE is selected. The higher rank of the band in the multiBandInfoList indicates the higher priority of the band, i.e., the first band supported by the UE among the bands listed in the multiBandInfoList is selected.

  In another embodiment of the present invention, in addition to bandwidth information, when handover is performed by using the X2 interface, the source base station and the target base station further exchange bandwidth priority information. Thereby, when X2 handover is performed, the band selected for the UE by the source base station is the same as the band selected by the target base station, thereby avoiding handover failure.

  FIG. 3A is an implementation flowchart of another communication method according to an embodiment of the present invention. As shown in FIG. 3A, the method includes:

  S201: The first base station acquires the band priority information of the cell of the second base station.

  In this embodiment of the invention, the band priority information indicates whether the priority of the band in the further band list configured for the cell is higher than the priority of the band configured for the cell. Used to indicate.

  In this embodiment of the invention, the first base station and the second base station are two base stations that set up the X2 interface. The X2 setup request message may be sent by the first base station, or the X2 setup request message may be sent by the second base station.

  In this embodiment of the present invention, when the X2 setup request message is transmitted by the first base station, the first base station sets the bandwidth priority information of the cell of the second base station to the following mode: Can get in.

  The first base station transmits an X2 setup request message to the second base station, the second base station receives the X2 setup request message transmitted by the first base station, and The response information is transmitted to the first base station, and the first base station receives the response information transmitted by the second base station in the X2 setup request message, and the response information is the cell band priority information. including.

  In this embodiment of the present invention, when the X2 setup request message is transmitted by the second base station, the first base station transmits the bandwidth priority information of the cell of the second base station to the following mode: Can get in.

  The second base station transmits an X2 setup request message to the first base station, the X2 setup request message includes band priority information of the cell, and the first base station transmits by the second base station. Received X2 setup request message, and the X2 setup request message includes cell bandwidth priority information.

  In addition to the cell bandwidth priority information being obtained using the X2 interface setup process, there is a possible method, i.e. the operator network configured for the second base station has an overall uniform priority. Configured by using degree information, the first base station directly uses a uniform or fixed priority information structure. However, the method may limit flexibility.

  S202: When handover is performed by using the X2 interface, the first base station selects a downlink ARFCN for the UE based on the band priority information of the cell.

  S203: The first base station obtains a key based on the downlink ARFCN, and transmits the key to the second base station.

  In this embodiment of the invention, in addition to bandwidth information, when handover is performed by using the X2 interface, the source base station and the target base station further exchange bandwidth priority information, Thereby, when an X2 handover is performed, the source base station and the target base station select a downlink ARFCN for the UE based on the same selection mechanism. Therefore, the band selected for the UE by the source base station is the same as the band selected by the target base station, thereby avoiding handover failure.

  A specific application scenario for this embodiment of the invention is shown in FIG. 3B.

  S301: The first base station recognizes a new neighboring cell, and then the first base station obtains the CGI of the newly recognized neighboring cell by distributing the measurement task of reportCGI, and the second base station Decide to set up an X2 interface with the base station.

  S302: The first base station transmits an X2 setup request (X2 SETUP REQUEST) message to the second base station, and the X2 SETUP REQUEST message includes the band information and the band priority information of the cell of the first base station. Including.

  S303: After receiving the X2 SETUP REQUEST message transmitted by the first base station, the second base station makes a response (response to the X2 setup request) using the X2 SETUP RESPONSE message, and the X2 SETUP RESPONSE message Includes the cell bandwidth information and bandwidth priority information of the second base station.

  S304: Each of the first base station and the second base station stores band priority information of a cell used as a neighbor cell of the other party, and naturally stores further band information.

  S305: If the neighbor cell, ie the cell of the second base station is used as the target cell for cell handover, the first base station determines the UE performance and the band information of the target cell and Select a band for the UE based on the bandwidth priority information, i.e., select a downlink ARFCN, the first base station obtains a key based on the selected downlink ARFCN, and obtains the obtained key Transmit to the second base station.

  In this embodiment of the invention, bandwidth priority information is exchanged by using the X2 interface, whereby the source base station and the target base station store the bandwidth information and the bandwidth priority information. Thus, when performing band selection based on the same selection mechanism, the source base station and the target base station may select a band for the UE based on the exchanged band priority information, thereby The band selected for the UE by the base station is the same as the band selected for the UE by the target base station, thereby avoiding handover failures.

  In this embodiment of the present invention, in addition to the exchange of bandwidth information by using the X2 interface, when the configuration of the neighboring base station changes, for example, when a cell is added to the neighboring base station, Or, when the bandwidth priority information of the cell of the adjacent base station changes, the adjacent base station may transmit the base station configuration update information, and the bandwidth priority information of the cell of the adjacent base station is changed to the current base station. Note that it can be notified.

  In yet another embodiment of the present invention, the communication method included in this embodiment of the present invention is described by using a UE as an executor. FIG. 4A is an implementation flowchart of still another communication method according to an embodiment of the present invention. As shown in FIG. 4A, the method includes:

  S401: The UE receives a message transmitted by a first base station and including a measurement configuration.

  In this embodiment of the invention, the measurement configuration is used to request the UE to report the cell's CGI. This embodiment of the invention is described by using an example where the measurement configuration is reportCGI.

  S402: The UE reports a measurement report, and the measurement report includes cell CGI and cell band information.

Optionally, in this embodiment of the invention, before the UE reports the measurement report, the method comprises the following steps:
The UE may further include obtaining cell CGI and cell band information and generating a measurement report.

  In this embodiment of the invention, after receiving a message containing reportCGI, the UE performs the measurement, obtains the CGI of the cell indicated by the base station, reads the system information of the cell, and obtains the cell bandwidth information. Acquire and generate a measurement report.

  In this embodiment of the invention, if one band is configured for a cell, the band information includes the band configured for the cell, and at least two bands are configured for the cell. If so, the band information includes a band configured for the cell and a further band list configured for the cell.

  Optionally, further, if at least two bands are configured for the cell, the measurement report further includes cell band priority information, and the band priority information is further configured for the cell. Used to indicate whether the priority of the band in the band list is higher than the priority of the band configured for the cell.

  Optionally, before the UE obtains cell band information, the method may further include step S401a, as shown in FIG. 4B.

  S401a: The UE receives indication information transmitted by the first base station, and the indication information is used to instruct the UE to report cell band information.

  In this embodiment of the invention, a first indication message may be included in the message, and the message may be an RRC connection reconfiguration message.

  Optionally, in this embodiment of the invention, the UE may further report performance information, ie, the method may further include step S401b, as shown in FIG. 4C.

  S401b: The UE reports performance information, and the performance information is used to indicate whether the UE supports reporting of cell band information.

  In this embodiment of the invention, the UE reads the cell band information based on the report CGI measurement and reports the band information to the first base station, whereby the first base station performs the report CGI measurement. The cell band information or band information and band priority information are acquired. Thus, the first base station stores the complete and accurate band information of the cell, whereby the first base station performs an accurate handover decision, thereby avoiding handover failures.

  In this embodiment of the present invention, the UE side performs the report CGI measurement, reads the cell band information, and reports the measurement report including the cell band information to the first base station. Note that reference is made to the implementation process of the method performed by the base station, and details are not described here.

  FIG. 5 is a schematic diagram of the interaction between the UE and the base station by using the communication method provided in the embodiment of the present invention. As shown in FIG. 5, the implementation process includes:

  S501: A base station transmits an RRC message to a UE, and the RRC message includes a measurement configuration.

  In this embodiment of the present invention, if the base station recognizes a new neighbor cell, the base station sends an RRC message to the UE, and the RRC message may be an RRC connection reconfiguration message, The message includes a measurement configuration, which is used to request the UE to report the CGI of the specified cell. In this embodiment of the invention, if the purpose of the measurement configuration is to measure the report CGI, the measurement configuration is used to request the UE to report the CGI of the specified cell.

  Optionally, in this embodiment of the invention, the RRC message sent by the base station may include indication information, which indicates whether to report newly recognized neighbor cell bandwidth information. Used to instruct the UE.

  Optionally, whether the UE supports reporting band information is a UE capability. Thus, in this embodiment of the invention, the RRC message instructs the UE to report the band information after the base station determines that the UE supports the reporting of band information according to the UE performance. Instruction information used for the purpose.

  S502: The UE performs measurement, acquires the CGI of the newly recognized neighbor cell, reads the system information of the newly recognized neighbor cell, and newly recognizes the band information and / or band of the neighbor cell Get priority information and generate a measurement report.

  Specifically, the UE may read cell system information block type 1 (System Information Block Type 1, SIB1) to obtain band information and / or band priority information. If the cell belongs to only one band, the cell broadcast broadcasts only the freqBandIndicator, and the band information read by the UE includes the band configured for the cell. If the cell belongs to multiple bands, in addition to the freqBandIndicator, the cell broadcast further broadcasts a further band list (multiBandInfoList) configured for the cell. Accordingly, the band information read by the UE includes a band configured for the cell (freqBandIndicator) and a further band list configured for the cell (multiBandInfoList).

  If the cell belongs to multiple bands, the system information of the cell may also broadcast freqBandIndicatorPriority. When the freqBandIndicatorPriority is broadcast, the priority of the band in the multiBandInfoList is higher than the priority of the band indicated by the freqBandIndicator, otherwise the priority of the band indicated by the freqBandIndicator is Higher than the priority. Whether to broadcast freqBandIndicatorPriority depends on the operator's policy.

  S503: The UE adds the read freqBandIndicator, multiBandInfoList, and / or freqBandIndicatorPriority to the measurement report to generate a measurement report.

  S504: The UE reports a measurement report to the base station, and the measurement report further includes band information and / or band priority information in addition to the CGI.

  S505: The base station stores acquired band information and / or band priority information related to neighboring cells.

  Note that step S505 is an optional step.

  S506: The base station determines whether the UE can be handed over to the neighboring cell based on the UE performance and neighboring cell band information, i.e., the UE in the neighboring cell band information If any band is supported, the UE is considered to be able to be handed over to a neighboring cell, otherwise the UE cannot be handed over.

  In this embodiment of the invention, for any UE that may be different from the UE where the base station stores the exact information of neighboring cells and then reports the band information, the neighboring as the target cell to which the UE is handed over If a cell is used, the base station may perform a handover decision based on neighboring cell information and may further select a corresponding band, ie, a downlink ARFCN, for the UE, whereby the UE , The downlink ARFCN is used as a parameter for obtaining the key.

  Using the communication method provided in this embodiment of the invention, the neighbor cell information obtained by the source base station is the same as the neighbor cell information obtained by the target base station, ie, the information element FreqBandIndicator, multiBandInfoList, and freqBandIndicatorPriority are acquired. Therefore, the source base station and the target base station select the same band for the UE based on the same rule, and the UE uses the band as a parameter for obtaining a key. Thus, the keys obtained are the same, thereby effectively avoiding the problem of handover failure.

  In another implementation of this embodiment of the present invention, upon receiving the measurement configuration, the UE performs the measurement, obtains the CGI of the cell, and the band corresponding to the ARFCN included in the measurement configuration is Check if the band is configured for the cell or if it is placed in a further band list configured for the cell. If the ARFCN included in the measurement configuration does not belong to the band configured for the cell and is not placed in the further band list configured for the cell, the UE It avoids handover failures caused by setting up inaccurate bandwidth information without reporting the acquired CGI. The implementation process is illustrated in FIG. 6 and includes:

  S601: The base station transmits an RRC connection reconfiguration message to the UE, and the RRC connection reconfiguration message includes a measurement configuration reportCGI.

  S602: Whether the band corresponding to the ARFCN included in the measurement configuration is a band configured for the cell, or is the UE placed in a further band list configured for the cell Check if and if yes, the UE generates a measurement report, otherwise the UE does not generate a measurement report.

  S603: The UE transmits a measurement report to the base station.

  By using the solution in this embodiment of the present invention, the neighbor cell bandwidth information stored by the base station may be incomplete but correct. If the base station has set up an X2 interface with neighboring cell base stations, the method of exchanging bandwidth priority information by using the X2 interface in the previous embodiment is Correct bandwidth information can be obtained. If the base station has not set up an X2 interface with the neighbor cell's base station, the UE handover to the neighbor cell may be reduced. However, handover failure may not result from the fact that the UE does not support neighboring cell bands.

  It should be noted that in the embodiments of the present invention, the execution numbers of the steps in the figures do not completely limit the execution sequence of the steps, and the figures are only for illustrative description. I want.

  Based on the communication method provided in the previous embodiment of the present invention, the embodiment of the present invention provides a base station 700. FIG. 7A is a schematic structural diagram of a base station 700 according to this embodiment of the present invention. As shown in FIG. 7A, the base station 700 includes a transmission unit 701, an acquisition unit 702, and a control unit 703.

  The sending unit 701 is configured to send a message including the measurement configuration to the UE, and the measurement configuration is used to request the UE to report the CGI of the cell.

  The acquisition unit 702 is configured to acquire a measurement report reported by the UE, the measurement report corresponding to the measurement configuration transmitted by the transmission unit and including cell CGI and cell band information. .

  The control unit 703 is configured to perform cell handover based on the cell bandwidth information acquired by the acquisition unit 702 and the cell CGI.

  In the first mode of implementation of this embodiment of the invention, if one band is configured for a cell, the band information acquired by the acquisition unit 702 includes the band configured for the cell. Including. If at least two bands are configured for the cell, the band information includes a band configured for the cell and a further band list configured for the cell.

  In the second mode of implementation of this embodiment of the present invention, if at least two bands are configured for a cell, the measurement report acquired by the acquisition unit 702 further includes the cell band priority information. Including. Band priority information is used to indicate whether the priority of the band in the further band list configured for the cell is higher than the priority of the band configured for the cell.

In the third mode of implementation of this embodiment of the invention, the transmitting unit 701 is
Before the acquisition unit 702 obtains a measurement report reported by the UE, it is further configured to send indication information, which is used to instruct the UE to report cell band information. The

In a fourth mode of implementation of this embodiment of the invention, the acquisition unit 702 is
Further configured to obtain performance information reported by the UE before the transmission unit 701 transmits the indication information and to determine that the UE supports reporting of cell bandwidth information according to the performance information. And the performance information is used to indicate whether the UE supports reporting of cell band information.

  In a fifth mode of implementation of this embodiment of the invention, the indication information sent by the sending unit 701 is included in a message containing the measurement configuration.

  In the sixth mode of implementation of this embodiment of the invention, the message sent by the sending unit 701 is a radio resource control RRC connection reconfiguration message.

In a seventh mode of implementation of this embodiment of the invention, the control unit 703 is
When handover is performed by using the X2 interface, the downlink absolute radio frequency channel number ARFCN for the UE is selected based on the cell band information or the cell band information and the band priority information, and the downlink It is further configured to obtain a key based on the ARFCN and transmit the key to the second base station, and the cell belongs to the second base station.

  Based on the foregoing communication method and the aforementioned base station provided in the embodiment of the present invention, the embodiment of the present invention is configured to implement the communication method shown in FIGS. 2A and 2B. A base station 7000 is further provided. FIG. 7B is a schematic structural diagram of a base station 7000 according to an embodiment of the present invention. As shown in FIG. 7B, base station 7000 includes a memory 7001, a processor 7002, and a transmitter 7003. In this embodiment of the invention:

  Memory 7001 is configured to store program code executed by processor 7002.

  The processor 7002 is configured to send a message including the measurement configuration to the UE by calling a program stored in the memory 7001 and using the transmitter 7003, the measurement configuration being the CGI of the cell. Used to request the UE to report The processor 7002 obtains a measurement report reported by the UE, the measurement report corresponding to the measurement configuration and includes cell CGI and cell bandwidth information. The processor 7002 stores the cell band information and the cell CGI, and performs cell handover based on the cell band information and the cell CGI.

  In particular, when one band is configured for a cell, the band information includes a band configured for the cell, and when at least two bands are configured for the cell, the band information Includes a band configured for the cell and a further band list configured for the cell.

  Further, if at least two bands are configured for the cell, the measurement report further includes cell band priority information, the band priority information being in a further band list configured for the cell. Used to indicate whether the bandwidth priority is higher than the bandwidth priority configured for the cell.

  Optionally, in this embodiment of the invention, processor 7002 is further configured to send indication information by using transmitter 7003 prior to obtaining a measurement report reported by the UE. The indication information is used to instruct the UE to report cell band information. The indication information is included in the message, and the message is a radio resource control RRC connection reconfiguration message.

  Optionally, in this embodiment of the invention, processor 7002 is further configured to obtain performance information reported by the UE prior to transmitting the indication information, wherein the performance information is The processor 7002 determines whether the UE supports the reporting of cell bandwidth information according to the performance information.

  Optionally, the processor 7002 stores the cell bandwidth information and then based on the cell bandwidth information or the cell bandwidth information and the bandwidth priority information when a handover is performed by using the X2 interface. Is further configured to select a downlink ARFCN for the UE, obtain a key based on the downlink ARFCN, and transmit the obtained key to the second base station, the cell to the second base station Belongs.

  In an embodiment of the present invention, base station 700 and base station 7000 use measurements to obtain cell band information, or cell band information and band priority information, so that the base station And get accurate bandwidth information. Thus, the base station performs an accurate handover decision, thereby avoiding handover failures.

  Embodiments of the present invention further provide a base station 800. FIG. 8A is a schematic configuration diagram of a base station 800 according to an embodiment of the present invention. Base station 800 includes an acquisition unit 801, a selection unit 802, and a transmission unit 803.

  The acquisition unit 801 is configured to acquire the band priority information of the cell of the second base station, and the band priority information indicates the priority of the band in the further band list configured for the cell. Used to indicate whether it is higher than the priority of the band configured for the cell.

  The selection unit 802 is configured to select a downlink ARFCN for the UE based on the cell bandwidth priority information when a handover is performed by using the X2 interface.

  The transmission unit 803 is configured to obtain a key based on the downlink ARFCN selected by the selection unit 802 and transmit the obtained key to the second base station.

In the first implementation mode of this embodiment of the present invention, the acquisition unit 801 obtains the band priority information of the cell of the second base station in the following manner:
The response information transmitted by the second base station of the X2 setup request message is received, and the response information is specifically configured to be acquired in a manner that includes cell bandwidth priority information.

In the second mode of implementation of this embodiment of the invention, the acquisition unit 801 obtains the bandwidth priority information of the cell of the second base station in the following manner:
An X2 setup request message transmitted by the second base station is received, and the X2 setup request message is specifically configured to obtain in a manner that includes cell bandwidth priority information.

  Based on the foregoing communication method and the aforementioned base station provided in the embodiment of the present invention, the embodiment of the present invention is a base station configured to implement the communication method shown in FIG. 3A. 8000 is further provided. FIG. 8B is a schematic structural diagram of a base station 8000 according to this embodiment of the present invention. As shown in FIG. 8B, the base station 8000 includes a memory 8001, a processor 8002, and a transceiver 8003. In this embodiment of the invention:

  The memory 8001 is configured to store program code executed by the processor 8002.

  The processor 8002 is configured to call a program stored in the memory 8001 and acquire the bandwidth priority information of the cell of the second base station by using the transceiver 8003. The bandwidth priority information Is used to indicate whether the priority of the band in the further band list configured for the cell is higher than the priority of the band configured for the cell, the processor 8002 uses the X2 interface By selecting a downlink ARFCN for the UE based on the cell bandwidth priority information, obtaining a key based on the downlink ARFCN, and using the transceiver 8003 when a handover is performed by using The obtained key is configured to be transmitted to the second base station.

In the first implementation mode of this embodiment of the present invention, in particular, the processor 8002 obtains the bandwidth priority information of the second base station cell in the following manner:
Response information transmitted by the second base station of the X2 setup request message may be received, and the response information may be obtained in a manner that includes cell band priority information.

In another implementation of this embodiment of the invention, in particular, the processor 8002 obtains the bandwidth priority information of the second base station cell in the following manner:
An X2 setup request message transmitted by the second base station may be received, and the X2 setup request message may be obtained in a manner that includes cell bandwidth priority information.

  In this embodiment of the present invention, in addition to the band information, when handover is performed by using the X2 interface, the base station 800 and the base station 8000 further exchange band priority information, Thereby, when an X2 handover is performed, the source base station and the target base station select a downlink ARFCN for the UE based on the same selection mechanism. Therefore, the band selected for the UE by the source base station is the same as the band selected by the target base station, thereby avoiding handover failure.

  Yet another embodiment of the present invention further provides user equipment 900. FIG. 9A is a schematic structural diagram of a user equipment 900 according to this embodiment of the present invention. As shown in FIG. 9A, user equipment 900 includes a receiving unit 901, a generating unit 902, and a reporting unit 903.

  The receiving unit 901 is configured to receive a message transmitted by the first base station and including a report CGI, and the report CGI is used to request the UE to report the CGI of the cell.

  The generation unit 902 is configured to obtain the cell CGI and the cell bandwidth information and generate a measurement report corresponding to the report CGI.

  The reporting unit 903 is configured to report the measurement report generated by the generation unit 902, and the measurement report includes cell CGI and cell bandwidth information.

  In particular, in this embodiment of the invention, if one band is configured for a cell, the band information includes the band configured for the cell, and at least two bands are configured for the cell. If so, the band information includes a band configured for the cell and a further band list configured for the cell.

  Further, if at least two bands are configured for the cell, the measurement report further includes cell band priority information, the band priority information being in a further band list configured for the cell. Used to indicate whether the bandwidth priority is higher than the bandwidth priority configured for the cell.

In the implementation mode of this embodiment of the present invention, the receiving unit 901 includes:
Before the generation unit 902 obtains the cell band information, the unit is further configured to receive the instruction information transmitted by the first base station, and the instruction information is sent to the UE to report the cell band information. Used to indicate.

  Optionally, the first indication message is included in the message, and the message is a radio resource control RRC connection reconfiguration message.

In another mode of implementation of this embodiment of the invention, the reporting unit 903 includes
Further configured to report performance information, the performance information is used to indicate whether the UE supports reporting of cell band information.

  Embodiments of the present invention further provide user equipment 9000. As shown in FIG. 9B, user equipment 9000 includes memory 9001, processor 9002, receiver 9003, and transmitter 9004. In this embodiment of the invention:

  The memory 9001 is configured to store program code executed by the processor 9002.

  The processor 9002 is configured to receive a message transmitted by the first base station and including a measurement configuration by calling a program stored by the memory 9001 and using the receiver 9003; The measurement configuration is used to request the UE to report the cell's CGI. The processor 9002 obtains the CGI of the cell and the cell bandwidth information and generates a measurement report corresponding to the measurement configuration. The processor 9002 reports a measurement report by using the transmitter 9004, where the measurement report includes cell CGI and cell bandwidth information.

  In this embodiment of the invention, if one band is configured for a cell, the band information includes the band configured for the cell, and at least two bands are configured for the cell. If so, the band information includes a band configured for the cell and a further band list configured for the cell.

  Further, if at least two bands are configured for the cell, the measurement report further includes cell band priority information, the band priority information being in a further band list configured for the cell. Used to indicate whether the bandwidth priority is higher than the bandwidth priority configured for the cell.

  In the implementation mode of this embodiment of the invention, the processor 9002 uses the receiver 9003 to receive indication information transmitted by the first base station before obtaining the cell bandwidth information. And the indication information is used to instruct the UE to report cell band information. The first indication message is included in the message, and the message is a radio resource control RRC connection reconfiguration message.

  In another implementation of this embodiment of the invention, the processor 9002 is further configured to report performance information by using the transmitter 9004, wherein the performance information is a cell bandwidth information of the UE. Used to indicate whether reporting is supported.

  In an embodiment of the present invention, user equipment 900 and user equipment 9000 perform measurements based on the measurement configuration, read cell band information, and report the band information to the base station, whereby the base station Bandwidth information, or cell bandwidth information and bandwidth priority information. Thus, the base station stores the complete and accurate band information of the cell, whereby the base station performs an accurate handover decision, thereby avoiding handover failure.

  The memory according to the above embodiments of the present invention is not limited, but is a read-only memory (English: Read-Only Memory, abbreviated as ROM), a random access memory (English: Random Access Memory, abbreviated as RAM), Erasable programmable read-only memory (English: Electrically Erasable Programmable Read-Only Memory, EEPROM for short), disk storage media or other disk storage, or the expected program code in command or data configuration form That can be any other media that can be used to store and that can be accessed by a computer It is to be meaning. For example, the memory may be a combination of the aforementioned memories.

  The processor according to the embodiment of the present invention may be a general central processing unit.

  One skilled in the art can appreciate that all or part of the steps in each of the foregoing methods of the embodiments can be performed by a program instructing the processor. Such a program may be stored in a computer-readable storage medium. Storage media may be non-accessible such as random access memory, read only memory, flash memory, hard disk, solid state drive, magnetic tape, floppy disk, optical disk, or any combination thereof. It can be non-transitory media.

  The present invention has been described with reference to flowcharts and block diagrams of methods and devices according to embodiments of the invention. It should be understood that computer program instructions may be used to implement the respective processes and respective blocks in the flowcharts and block diagrams, and the combinations of processes and blocks in the flowcharts and block diagrams. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of any other programmable data processing device to generate a machine, thereby causing the computer or any other The instructions executed by the processor of the programmable data processing device generate an apparatus for performing a particular function in one or more processes in the flowchart or in one or more blocks in the block diagram.

  The foregoing descriptions are merely exemplary implementation modes of the present invention, and are not intended to limit the protection scope of the present invention. Any variation or alternative readily figured out by a person skilled in the art disclosed in the present invention shall fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be the protection scope of the claims.

Claims (21)

Transmitting a measurement configuration to a user equipment by a first base station;
Obtaining a measurement report from the user equipment by the first base station, the measurement report including a cell global identifier of a cell and band information of the cell;
Performing cell handover by the first base station based on the band information of the cell and the cell global identifier of the cell;
If at least two bands are configured for the cell, the band information includes one band configured for the cell and a further band list configured for the cell; The further band list is a communication method related to a band other than the one band configured for the cell. The measurement report indicates whether the priority of the further band list configured for the cell is higher than the priority of the one band configured for the cell. The method of claim 1 further comprising information. Further comprising: transmitting indication information by the first base station, wherein the indication information is used to instruct the user equipment to report the band information of the cell. Item 3. The method according to Item 1 or 2. Obtaining performance information reported by the user equipment, wherein the performance information is used to indicate whether the user equipment supports reporting of the band information of the cell; The method according to any one of claims 1 to 3, further comprising: Selecting handover absolute radio frequency channel number ARFCN for the user equipment based on the band information of the cell by the first base station when a handover is performed using an X2 interface; The cell belongs to a second base station, and
5. The method according to claim 1, further comprising: obtaining a key based on the downlink ARFCN by the first base station, and transmitting the key to the second base station. Method. A downlink absolute radio frequency channel number for the user equipment based on the band information and the band priority information of the cell by the first base station when a handover is performed by using an X2 interface Selecting an ARFCN, wherein the cell belongs to a second base station; and
The method according to claim 2, further comprising: obtaining a key by the first base station based on the downlink ARFCN and transmitting the key to the second base station. Receiving a measurement configuration from a base station by a user equipment;
Reporting a measurement report by the user equipment to the base station, the measurement report comprising a cell global identifier of a cell and bandwidth information of the cell;
If at least two bands are configured for the cell, the band information includes one band configured for the cell and a further band list configured for the cell; The further band list is a communication method related to a band other than the one band configured for the cell. The measurement report indicates whether the priority of the further band list configured for the cell is higher than the priority of the one band configured for the cell. The method of claim 7 further comprising information. Prioritizing the further band list according to the band priority information by the user equipment;
If the user equipment does not support any bands in the further band list, the user equipment further uses the one band configured for the cell according to the band priority information; The method according to claim 8. Receiving, by the user equipment, indication information from the base station, wherein the indication information is used to instruct the user equipment to report the band information of the cell; A method according to any one of claims 7 to 9. Reporting performance information by the user equipment, wherein the performance information is used to indicate whether the user equipment supports reporting of the band information of the cell. 11. A method according to any one of claims 7 to 10. A transmission unit configured to transmit the measurement configuration to the user equipment;
An acquisition unit configured to acquire a measurement report from the user equipment, wherein the measurement report includes a cell global identifier of a cell and band information of the cell;
A control unit configured to perform cell handover based on the cell global identifier of the cell and the band information of the cell;
If at least two bands are configured for the cell, the band information includes one band configured for the cell and a further band list configured for the cell; The further band list is a base station related to a band other than the one band configured for the cell. The measurement report further includes band priority information indicating whether a priority of the further band list configured for the cell is higher than a priority of the one band configured for the cell. The base station according to claim 12. The transmitting unit is
Prior to the acquisition unit acquiring the measurement report reported by the user equipment, the instruction unit is further configured to transmit instruction information, the instruction information reporting the band information of the cell. The base station according to claim 12 or 13, which is used for instructing a device. The acquisition unit is
Before the transmission unit transmits the instruction information, obtain performance information reported by the user equipment, and according to the performance information, the user equipment supports reporting of the band information of the cell. The base station according to claim 14, further configured to determine, wherein the performance information is used to indicate whether the user equipment supports reporting of the band information of the cell. A receiving unit configured to receive a measurement configuration from a base station;
A reporting unit configured to report a measurement report to the base station, the measurement report comprising: a reporting unit that includes a cell global identifier of a cell and bandwidth information of the cell;
If at least two bands are configured for the cell, the band information includes one band configured for the cell and a further band list configured for the cell; The further band list is a user equipment related to a band other than the one band configured for the cell. The measurement report further includes band priority information indicating whether a priority of the further band list configured for the cell is higher than a priority of the one band configured for the cell. The user equipment according to claim 16. Means for prioritizing the further bandwidth list according to the bandwidth priority information;
18. The means further comprising means for using the one band configured for the cell according to the band priority information when the user equipment does not support any band in the further band list. User equipment as described. The receiving unit is
17. The apparatus is further configured to receive instruction information transmitted by the base station, and the instruction information is used to instruct the user equipment to report the band information of the cell. 18. User equipment according to item 17. The reporting unit is
20. The system according to claim 16, further configured to report performance information, wherein the performance information is used to indicate whether the user equipment supports reporting of the band information of the cell. The user equipment according to claim 1.   12. A non-transitory computer readable recording medium, wherein the computer readable recording medium stores a program, and when the program is executed by a processor, the steps according to any one of claims 1 to 11 are executed. Recording medium.

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